撞击载荷的三维效应

Shan Wang, C. Guedes Soares
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摘要

本文采用非定常不可压缩Reynolds-Average Navier-Stokes (RANS)方程和流体体积(VOF)方法,在开放源代码库OpenFoam中的interDyMFoam求解器中实现了对船体剖面撞击载荷预测的三维影响进行了数值研究。根据ITTC指南,考虑不同分辨率和恒科朗数(CFL),进行了收敛性和不确定性研究。通过将CFD模拟结果与现有实验值进行对比,验证了数值解的正确性。对二维船体截面上的总冲击力和冲击压力与三维模型进行了比较和讨论。考虑不同的进入速度,对横截面力和压力的三维影响在物体的横向和纵向上都进行了量化。给出了三维模型的无因次压力系数分布。
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Three-Dimensional Effects on Slamming Loads
Three-dimensional effects on slamming loads predictions of a ship section are investigated numerically using the unsteady incompressible Reynolds-Average Navier-Stokes (RANS) equations and volume of fluid (VOF) method, which are implemented in interDyMFoam solver in open-source library OpenFoam. A convergence and uncertainty study is performed considering different resolutions and constant Courant number (CFL) following the ITTC guidelines. The numerical solutions are validated through comparisons of slamming loads and motions between the CFD simulations and the available experimental values. The total slamming force and slamming pressures on a 2D ship section and the 3D model are compared and discussed. Three-dimensional effects on the sectional force and the pressures are quantified both in transverse and longitudinal directions of the body considering various entry velocities. The non-dimensional pressure coefficient distribution on the 3D model is presented.
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